Friction draft-gear.



J. FOGONNOB.. FRICTION- DRAFT GEAR. APPLxoA'rxoN ,FILED $120.18, 190s.

Patented Feb. 3, 1914 QQ" .N mm.

MTSSESDM :NvENroR John F -O C0/m0? BYMLMAJI d w oarig. i.

vstop members being UNrrun srarss ra'rsnr carros.

JOHN F. OCONNOR, OF CHICAGO, ILLINOIS, -ASSIGNOR, BY MESNEASSIG-Nll/IEN'IS, T

WILLIAM H. MINER, OF

CHICAGO, ILLINOIS.

To all whom t may concern.:

Be it known that I, JOHN F. OCoNNoR, a citizen 'of the United States,residing in Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Friction Draft-Gear, of whichthe following is a specification.

My invention relatesto improvements in friction draft gear for railwaycars.

My invention consists in the novel construction of parts and devices andin the novel combinations of parts and devices herein shown anddescribed and more particularly specified in the claims.

In the accompanying' drawing forming a part of this specification,Figure 1 is a side elevation, partly in central, vertical longitudinalsection of a friction draft gear or rigging embodying my invention. Fig.2 is a plan view, partly in horizontal section. Figs. 3, 4, 5 and 6 arevertical cross sections on lines 3 3, 4 4, 5 5 and 6 6, respectively, InFig. 5 however the rear stops are omitted in order to show the laterallyprojectingV follower acting wings of the spring case. Fig. 7 is adetail, partial per spective view, showing one corner of the frictionshelland spring case. Fig. 8 is a detail, perspective view of one of thefriction shoes. Fig. 9 is a detail elevationof the wedge. Fig. 10 is adetail perspective View, showing a portion of the rear end of the springcase.

In the drawing, 1, 1 representscenter sills or other draft members ofthe car frame to which the,draft rigging is applied, 2 the front or endsill, 3 the buffer block or plate, 4 the draw-bar, the draw-bar byrivets 6, and interengaging shoulders or gibs 7, 8, 9 the frontfollower, 1G 10a the stop members having front stops 1l, rear stops 12and an intermediateV or limiting stop 13 for` the front follower, thepreferably secured to the draft sills by rivets 14.

15, 16 and 17 are the springs, within another.

18 is a longitudinally movable friction shell, having an internal,preferably cylindric, friction face 10, in sliding frictional engagementwith the external friction faces 20 of the segmental friction shoes 2l,preferably three in. number, which fit within the friction shell. 18,and which are expanded outward against the friction shell by a.-cennesting one Specication of Letters Patent.

Application led December 18, 1909.

5 th'e draft yoke secured to Patented Feb. 3,1914. Serial No. 533,742.

tral wedge 22 acting through the interposed anti-friction rollers 23which have a rolling action upon the inclined or wedging faces 24 of thewedge 22 and 25 of the friction shoes 21, the rollers being kept inproper position by seats or shoulders 26 on the wedge and 27 on thesegmental friction shoes.

2 8 is a separate piece spring case having a limited, sliding ortelescopic movement in respect to the friction shell 18. The spring case28 has an internal, preferably cylindrie, wall 29 conforming in diameterto that .of the larger coil spring l5, and it has an eX- ternal wall 30which is preferably substantially rectangular in shape to fit betweenand be guided byfthe inner upright faces 'of the stop member 10 andsills 1 and the inner horizontal faces of the draft yoke 5. The frictionshell 18 at its rear end 31 fits and telescopes within the front end ofthe spring case 28 and it is provided with an external limiting' flangeor shoulder 32 to limit the sliding movement of the friction shell andspring case in respect to each other.

The spring case 28 is provided n ear its rear end on its opposite sideswith externally projecting integral wings or members 33 which byengagement with the stops 12 of the stop members, causes the spring caseto serve as a rear follower in resisting buiiing strains; and 'thespring case 28 by the engagement of its rear end 34 with the draft yoke5 causes the spring case to serve as a. rear follower under pullingstrains. The spring case 28 is preferably furnished with an integralhead 35, against which the rear ends of the springs abut, and which isprovidedwith a central recess 36 to receive the nut 37 of the connectingrod 38, the head 39 of which fits in a recess 40 in the wedge 22, theconnecting rod extending through the springs and serving to connect allthe parts together and hold them in assembled position. The springseat/or cap 41 is interposed between the springs at the front endsthereof and the friction shoes 21, the same having a central recess orcut away portion 42 to give the cap 41 an outer bearing face 43 onlyagainst the adjacent ends of the friction shoes 21.

The integral follower-acting ings or 1 projections 33 on the spring caseare located intermediate the ends thereof, that is to say, at a distanceremoved from the. rear end of thespring case so that the front and rearstops 11, 12 may be at the standard or reguv lar distance apart, andenable the draft rigging at the same time to have springs 15, 16, 1T,which are materially longer and have a materially greater compressivemovement or travel than regular or standard springs. My improvedfriction draft rigging is thus adapted to interchangeably go into anycar having stops arranged at standard distance' apart, and at the sametime afford a materially greater cushioning movement and cushioningcapacity. The draft gear is removably supported on the draft sills orframe members 1, 'l of the car, preferably by a tie-plate 4A havingshort connecting bolts 45.

The friction shell 18 and spring case 28 are preferably telescopicallyor slidingly connected together by connecting bolts 46 at the fourcorners of the spring case 28, and which extend through connectingmembers 4:7 on the spring case and 48 on the friction shell, the springVcase having corner recesses "t9 to accommodate the heads of the'connect.- ing bolts. n

The front stop member 10 is preferably of malleable iron and has thefront stop 11 and limiting stop 13 formed integrally togather. The frontstop member 10 is also provided with an upper horizontal guide flangefor the follower, and with inwardly projecting horizontal andlongitudinally extending strengthening flanges 51 and an upright,transversely extending terminal flange 52. At its front end, the stopmember' 10 is also provided with upper and lower strengthening flangesor webs 53. The rear stop members 10a are preferably in separate piecesfrom the front stop members 10. By making the stop members which have 0rbear the front stop or stops in 'separate pieces from the stop membershaving or bearing the rear stop or stops, the malleable iron or castmetal stop membersare materially reduced in length or size and adaptedto be cast or made more readily, cheaply and perfectly. Y

l claim: l 1. In a friction draft rigging, the combi-A nation with stopmembers having front and rearstops at standard distances apart, of afriction shell, a spring case, a spring Within said case of greater thanstandard length and compressive movement', said spring case havingexternal projections forward of its rear end for engagement with therear stops, said spring 'case being in a separate piece from saidfriction shell and having a limited sliding movement in respect thereto,and connecting bolts between said friction shell and spring case andslidable in respect thereto, substantiallyr as specified.

Q.. In a friction draft rigging, the combination with stop membershaving front and rear stops at standard distances apart, of a frictionshell, a spring case, a sprlng within said case of greater than standardlength and compressive movement, said spring case having externalprojections forward of its rear end for engagement with the rear stops,

said spring case being in a separate piece from said friction shell andhaving a limited sliding movement in respect thereto, and connectingbolts between said friction shell and spring case, said spring case`being internally cylindric and externally rectangular, and saidconnecting bolts being at the corners of said spring case, substantiallyas specified. g

3. In a friction draft rigging, the combination with stop members havingfront and rear stops, of a. friction shell, a spring case, said case andshell being telescoped to there by maintain the same in alinement, andsaid spring case having external projections forward'of its rear end forengagement with said rear stops, a wedge and friction shoes Y Withinsaid shell, a spring within said case of greater than standard lengthand 'compressive movement, and means connecting said shell and caseadapted to prevent'the same from being separated vand at the same timepermitting relative movement therebetween, said means including anelement connected to one of said members and loosely engaging the other,substantially as speci# JOHN F. OCONNOR,

fied.

Witnesses:

EDMUND Anacon,

BEARL ABRAMs.

